BQ27520-G4 Datasheet, PDF (27/34 Pages) Texas Instruments – System-Side Impedance Track Fuel Gauge

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11.2 Layout Example
BATTERY PACK
CONNECTOR
PACK+
Use copper
pours for battery
power path to
minimize IR
losses
Kelvin connect the
BAT sense line right
at positive terminal to
battery pack
THERM
bq27520-G4
SLUSB20B – NOVEMBER 2012 – REVISED DECEMBER 2015
Battery power
connection to
system
SCL
To system host
processor
SDA
BAT_LOW
BAT_GD
C1
C2
BI/TOUT
BAT
REGIN
C3
TS
CE
VCC
BAT_LOW
VSS
VSS
SDA
BAT_GD
SRN
SCL
SOC_INT
SRP
SOC_INT
PACK –
10 mΩ 1%
Via connects to Power Ground
Kelvin connect SRP
and SRN
connections right at
Rsense terminals
Figure 17. Layout Recommendation
Ground return to
system
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